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Title:
METHOD FOR PRODUCING POLYTHIOL COMPOUND FOR OPTICAL MATERIAL AND POLYMERIZABLE COMPOSITION CONTAINING SAME
Document Type and Number:
WIPO Patent Application WO/2007/129449
Kind Code:
A1
Abstract:
Disclosed is a method for producing a polythiol compound for optical materials, wherein a 2-mercaptoethanol having a bis(2-hydroxyethyl)disulfide content of not more than 0.5% by weight is reacted with an epihalohydrin compound, thereby producing a polythiol compound via a polyalcohol.

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Inventors:
KUMA SHIGETOSHI (JP)
KAWAGUCHI MASARU (JP)
KOBAYASHI SEIICHI (JP)
Application Number:
PCT/JP2007/000398
Publication Date:
November 15, 2007
Filing Date:
April 12, 2007
Export Citation:
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Assignee:
MITSUI CHEMICALS INC (JP)
KUMA SHIGETOSHI (JP)
KAWAGUCHI MASARU (JP)
KOBAYASHI SEIICHI (JP)
International Classes:
C07C319/14; C07C321/14; C08G18/38
Foreign References:
JPH02270859A1990-11-05
JPH05208950A1993-08-20
JPH09286772A1997-11-04
JPH02270859A1990-11-05
JPH09110955A1997-04-28
JPH09110956A1997-04-28
Other References:
See also references of EP 2011785A1
Attorney, Agent or Firm:
HAYAMI, Shinji et al. (2-17-16 Ebisu-Nishi, Shibuya-k, Tokyo 21, JP)
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